gnome-power-manager has been rewritten for GNOME 3.2, and is now merged into gnome-settings-daemon as a plugin and this manages policy. The power management is done by UPower for most parts, except backlight.This is managed at Session level by g-s-d via power plugin using XRandR or plain old sysfs depending upon driver support.
To manages screen brightness settings, one would do so via dbus, such as shown below
Now the question being, why bother at all with this aspect. On a tablet, this settings needs to be digged out and non-trivial to access. With gnome-shell-extension brightness ( http://people.redhat.com/rkhadgar/personal/gnome3-tablet/brightness.tar.xz ), you can manage the brightness from your desktop. This requires g-s-d to be patched to support "Changed" signal ( https://bugzilla.gnome.org/show_bug.cgi?id=658493 ).
On a side note, devs at gnome-shell are very helpful and felt good talking to them, along with rhughsie.
ToDO
To manages screen brightness settings, one would do so via dbus, such as shown below
$ gdbus call --session --dest org.gnome.SettingsDaemon --object-path /org/gnome/SettingsDaemon/Power --method org.gnome.SettingsDaemon.Power.Screen.GetPercentage
Now the question being, why bother at all with this aspect. On a tablet, this settings needs to be digged out and non-trivial to access. With gnome-shell-extension brightness ( http://people.redhat.com/rkhadgar/personal/gnome3-tablet/brightness.tar.xz ), you can manage the brightness from your desktop. This requires g-s-d to be patched to support "Changed" signal ( https://bugzilla.gnome.org/show_bug.cgi?id=658493 ).
On a side note, devs at gnome-shell are very helpful and felt good talking to them, along with rhughsie.
ToDO
- display brightness symbolic icon needs different levels, and one for auto setting.
- Ambient Light Sensor support on linux seems spotty, and needs to be fixed.
